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This article introduces the Complexity of Interaction Sequences model (CIS). CIS describes the structure of interaction techniques and the SimCIS simulator uses these descriptions to predict their performance in the context of an interaction sequence. The model defines the complexity of an interaction technique as a measure of its effectiveness within a given context. We tested CIS to compare three...
Designing interactive computer systems involves relating informal understandings of practice to the formal language and notations of the computer. For interactive systems that support certain types of ‘knowledge work’, this relationship is mirrored in the user interface. For example, the users of spreadsheets, aircraft flight management systems, or even domestic heating controllers, can find themselves...
In this paper, we present a study which aims at designing a locomotion assistance device that can deliver semantic information about its surrounding environment at any time. As a first step towards this goal, we introduce an original model suited for the description of building structure, and we present an algorithm that exploits these descriptions. Then, we explain how it is possible to link semantics...
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